BCA BUS – Preheating electric coil

Circular electric coil used to preheat incoming air and controlled by the HRV unit (Dee Fly Cube or Dee Fly Modulo) via a BUS port.

Jointed galvanised steel shell.

Tube resistance connected to an external connection box.

Stainless steel AISI 321L heating pin.

IP40 protection rating.

Manual and automatic temperature limiter (60°C / 120°C).

Assembly on circular ductwork, upstream of the HRV unit.

Suitable for indoor use only.

Operating in ON/OFF mode (OFF = 0W, ON = 1500W).

Controlled by the HRV unit according to the following operating rules :

The BCA BUS is activated (P=1500W) when the temperature of incoming air ≤ 0°C.

The BCA BUS stops when the temperature of incoming air > 0°C.

Frost protection principle : to prevent fros on the HRV unit, 2 actions are taken in parallel :

as indicated below, the BCA BUS is activated from below 0°C to heat the incoming air.

below -12°C, the maximum airflow supplied by the HRV unit is lowered so that the air can be heated sufficiently.

when the incoming air reaches the severe frost limit (-40°C for Dee Fly Modulo and -45°C for Dee Fly Cube), the air inflow is stopped (zero airflow). The HRV unit then operates simply as an Exhaust unit.